// 实现这个项目的构建任务
const { src, dest, parallel, series, watch } = require('gulp')
const del = require('del')
const csscomb = require('csscomb');

const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()

const browserSync = require('browser-sync')
const bs = browserSync.create()

const minimist = require('minimist')

// 默认配置
const defaultOption = {
    string: [
        'env',
        'port',
        'open',
        'branch',
    ],
    default: {
        env: 'production',
        port: 2080,
        open: false,
        branch: 'gh-pages',
    }
}

const options = minimist(process.argv.slice(2), defaultOption)

const data = {
    menus: [
        {
            name: 'Home',
            icon: 'aperture',
            link: 'index.html'
        },
        {
            name: 'Features',
            link: 'features.html'
        },
        {
            name: 'About',
            link: 'about.html'
        },
        {
            name: 'Contact',
            link: '#',
            children: [
                {
                    name: 'Twitter',
                    link: 'https://twitter.com/w_zce'
                },
                {
                    name: 'About',
                    link: 'https://weibo.com/zceme'
                },
                {
                    name: 'divider'
                },
                {
                    name: 'About',
                    link: 'https://github.com/zce'
                }
            ]
        }
    ],
    pkg: require('./package.json'),
    date: new Date()
}

const clean = () => {
    return del(['dist', 'temp'])
}

const lint = () => {
    const comb = new csscomb(require('./.csscomb.json'))
    comb.processPath('src')
    return src('src/assets/scripts/*.js')
        .pipe(plugins.eslint())
        .pipe(plugins.eslint.format())
        .pipe(plugins.eslint.failAfterError())
}

const style = () => {
    return src('src/assets/styles/*.scss', { base: 'src' })
        .pipe(plugins.sass({ outputStyle: 'expanded' }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}

const script = () => {
    return src('src/assets/scripts/*.js', { base: 'src' })
        .pipe(plugins.babel({ presets: [require('@babel/preset-env')] }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}

const page = () => {
    return src('src/*.html', { base: 'src' })
        .pipe(plugins.swig({ data }))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}

const image = () => {
    return src('src/assets/images/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}


const font = () => {
    return src('src/assets/fonts/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}

const extra = () => {
    return src('public/**', { base: 'public' })
        .pipe(dest('dist'))
}

const publish = () => {
    return src('dist')
        .pipe(plugins.ghPages({
            remoteUrl: 'https://pages.github.com',
            cacheDir: 'temp/publish',
            branch: options.branch
        }))
}

const automatedServer = () => {
    watch('src/assets/styles/*.scss', style)
    watch('src/assets/scripts/*.js', script)
    watch('src/*.html', page)

    watch([
        'src/assets/images/**',
        'src/assets/fonts/**',
        'public/**',
    ], bs.reload)

    bs.init({
        notify: false,
        port: options.port,
        open: options.open !== false ? true : false,
        server: {
            baseDir: ['temp', 'src', 'public'],  // 服务器根目录
            routes: {
                '/node_modules': 'node_modules'
            }
        }
    })
}

const useref = () => {
    return src('temp/*.html', { base: 'temp' })
        .pipe(plugins.useref({ searchPath: ['temp', '.'] }))
        // 文件压缩
        .pipe(plugins.if(/\.js$/, plugins.uglify()))
        .pipe(plugins.if(/\.html$/, plugins.htmlmin({
            collapseWhitespace: true,
            minifyCSS: true,
            minifyJS: true
        })))
        .pipe(plugins.if(/\.css$/, plugins.cleanCss()))
        .pipe(dest('dist'))
}

// 编译
const compile = parallel(style, script, page)

const serve = series(compile, automatedServer)

const start = serve

const build = series(
    clean,
    parallel(
        series(compile, useref),
        image,
        font,
        extra
    )
)

// 部署
const deploy = series(build, publish)

module.exports = {
    clean,
    lint,
    compile,
    serve,
    build,
    start,
    deploy
}